Statistics for Business and Economics plus MyLab Statistics with Pearson eText -- Access Card Package (8th Edition)
8th Edition
ISBN: 9780321937940
Author: Paul Newbold, William Carlson, Betty Thorne
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 2.2, Problem 17E
a)
To determine
The percent of observations between 65 and 85.
b)
To determine
Calculate the percent of observations between 65 and 85 using the empirical rule.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
I have a distribution with mean zero and variance of 9. I sample 4 people from the population. What is my standard error? Round to 3 decimal points.
In your own words, describe what the difference is between an error term and a residual. How does sample size affect the variance of each?
I have a dataset with 20 numbers in it. It has a variance of 16, a mean of 10, and a median of 12. What is the measure of skewness?
Chapter 2 Solutions
Statistics for Business and Economics plus MyLab Statistics with Pearson eText -- Access Card Package (8th Edition)
Ch. 2.1 - Prob. 1ECh. 2.1 - Prob. 2ECh. 2.1 - Prob. 3ECh. 2.1 - Prob. 4ECh. 2.1 - Prob. 5ECh. 2.1 - Prob. 6ECh. 2.1 - Prob. 7ECh. 2.1 - Prob. 8ECh. 2.1 - A random sample of 156 grade point averages for...Ch. 2.1 - Prob. 10E
Ch. 2.2 - Prob. 12ECh. 2.2 - Prob. 13ECh. 2.2 - Prob. 14ECh. 2.2 - Prob. 15ECh. 2.2 - Prob. 16ECh. 2.2 - Prob. 17ECh. 2.2 - Prob. 18ECh. 2.2 - Prob. 19ECh. 2.2 - Prob. 20ECh. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.3 - Prob. 26ECh. 2.3 - Prob. 27ECh. 2.3 - Prob. 28ECh. 2.3 - Prob. 29ECh. 2.3 - Prob. 30ECh. 2.3 - Prob. 31ECh. 2.3 - Prob. 32ECh. 2.3 - Prob. 33ECh. 2.3 - Prob. 34ECh. 2.4 - Prob. 35ECh. 2.4 - Prob. 36ECh. 2.4 - Prob. 37ECh. 2.4 - Prob. 38ECh. 2.4 - Acme Delivery offers three different shipping...Ch. 2.4 - Prob. 40ECh. 2.4 - Prob. 42ECh. 2.4 - Prob. 43ECh. 2 - Prob. 44ECh. 2 - Prob. 46ECh. 2 - Prob. 47ECh. 2 - Prob. 49ECh. 2 - Prob. 50ECh. 2 - Prob. 51ECh. 2 - Prob. 52ECh. 2 - Prob. 55ECh. 2 - Prob. 56E
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, economics and related others by exploring similar questions and additional content below.Similar questions
- For the Given values of 56, 67.9, 68, 53.8 and 69.8, Calculate a) Mean b) Algebraic Sum of deviation c) Variance d) Standard Deviation.arrow_forwardI'm assuming for this problem I need to find the z-score first then find the value on the distribution chart?The mean number of calories consumer per day for females aged 27 is 2725 with a standard deviation of 277. If a simple random sample of 100 females is selected, what is the probability that the mean number of calories ingested is more than 2800?arrow_forwardYou survey 5 members of a college class about how many hours they study each week: 12 hours, 18 hours, 7 hours, 3 hours, and 15 hours. The class has a total of 28 students. Based on the findings from the 5 students you interviewed, what is the standard deviation for the entire class? What is the range of hours you can expect students to study based on one standard deviation? (Hint: Think Normal Distribution Curve).arrow_forward
- The price for two tickets (including online service charges), a large popcorn, and two medium soft drinks at a sample of six theatre chains is as follows: $36.15 $31.00 $35.05 $40.25 $33.75 $43.00 (a) Compute the mean and median. (b) Compute the variance, standard deviation, and range. (c) Are the data skewed? If so, how? (d) Based on the results of (a) through (c), what conclusions can you reach concerning the cost of going to the movies?arrow_forwardIn one of its Spring catalogs, L.L. Bean advertised footwear on 29 of its 192 catalog pages. Suppose we randomly surgery 20 pages. We are interested in the number of pages that advertise footwear. Each page may be picked at most once. Calculate the standard deviationarrow_forwardAmericans spend an average of 23.6 hours per week online, with a standard deviation of 7. The distribution of internet watching is not necessarily normally distributed. Suppose you took a random sample of 50 people. What is the probability that the sample average will be less than 23 hrs? Round your answer to three decimal places, eg 0.628.arrow_forward
- ii) Suppose that you find out that you have an OLS estimator which is unbiased but has a non-minimum variance. Discuss two practical steps that you take to reduce the variance of your OLS estimator. Explain your reasoning.arrow_forwardThe heights of NBA players are normally distributed, with an average height of 6'7" (i.e. 79 inches), and a standard deviation of 3.5". You take a random sample of 8 players, and calculate their average height. What is the probability that this sample average is between 78 and 81 inches?arrow_forwardA common test was given to a no. of students taken at random from a particular class of the department to assess the significance of possible variance of performance. Make an analysis of variance with the given data: A: 5 6 8 9 7 B: 8 10 11 12 4 C: 7 3 5 4 1arrow_forward
- A NUMMI assembly line, which has been operating since 1984, builds 900 cars and trucks in a week. Generally, 10% of those cars are defective coming off the assembly line. What type of distribution does the event of having defective cars follow? What are the mean and standard deviation of this random event? (6 points) Can we apply the normal distribution to study this event? Check the conditions and answer the question. (6 points) Find the probability that the assembly line produces at least 825 cars, that are not defective and functional, in a week. Graph the situation, shade in the area to be determined, and find the probability. (6 points)arrow_forwardAccording to a study done by UCB students, the height for Martian adult males is normally distributed with an average of 68 inches and a standard deviation of 2.5 inches. Suppose one Martian adult male is randomly chosen. Let X = height of the individual. Round all answers to 4 decimal places where possible. PLEASE ROUND TO 4 DECIMAL PLACES THANK YOU! a. What is the distribution of X? X ~ N(,)b. Find the probability that the person is between 63.2 and 66.2 inches. c. The middle 40% of Martian heights lie between what two numbers?Low: inchesHigh: inchesarrow_forwardSuppose commute times in a large city are normally distributed and that 65.20% of commuters in this city take more than 22 minutes to commute one-way. If the standard deviation of such commutes is 6.5 minutes, what is the mean commute?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Economics (12th Edition)EconomicsISBN:9780134078779Author:Karl E. Case, Ray C. Fair, Sharon E. OsterPublisher:PEARSONEngineering Economy (17th Edition)EconomicsISBN:9780134870069Author:William G. Sullivan, Elin M. Wicks, C. Patrick KoellingPublisher:PEARSON
- Principles of Economics (MindTap Course List)EconomicsISBN:9781305585126Author:N. Gregory MankiwPublisher:Cengage LearningManagerial Economics: A Problem Solving ApproachEconomicsISBN:9781337106665Author:Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike ShorPublisher:Cengage LearningManagerial Economics & Business Strategy (Mcgraw-...EconomicsISBN:9781259290619Author:Michael Baye, Jeff PrincePublisher:McGraw-Hill Education
Principles of Economics (12th Edition)
Economics
ISBN:9780134078779
Author:Karl E. Case, Ray C. Fair, Sharon E. Oster
Publisher:PEARSON
Engineering Economy (17th Edition)
Economics
ISBN:9780134870069
Author:William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher:PEARSON
Principles of Economics (MindTap Course List)
Economics
ISBN:9781305585126
Author:N. Gregory Mankiw
Publisher:Cengage Learning
Managerial Economics: A Problem Solving Approach
Economics
ISBN:9781337106665
Author:Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike Shor
Publisher:Cengage Learning
Managerial Economics & Business Strategy (Mcgraw-...
Economics
ISBN:9781259290619
Author:Michael Baye, Jeff Prince
Publisher:McGraw-Hill Education